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| 1 | Thin Accretion Discs Around Neutron and Quark Stars 显示文摘 | KOVACS Z CHENG K S HARKO T | 2009 | Astronomy and Astro- physics2009，500，2： | 1 |
| 2 | Full causal bulk-viscous cosmological models显示文摘 | Mak M K and Harko T | 1998 | J Math Phys1998，39，： | 1 |
| 3 | Exact causal viscous cosmologies显示文摘 | Mak M K and Harko T | 1998 | Gen Rel Gray1998，30，： | 1 |
| 4 | Solutions generating technique for Abel-type nonlinear ordinary differential equations显示文摘 | Mak M K Chan H W and Harko T | 2001 | Computers Math Applic2001，41，： | 1 |
| 5 | New method for generating general solution of Abel differential equation显示文摘 | Mak M K and Harko T | 2002 | Computers and Mathematics with Applications2002，43，： | 1 |
| 6 | Introduction to the special issue on normative muhiagent systems 显示文摘 | Guido B Leendert T Harko V | 2008 | Autonomous Agents and Multi-Agent Systems2008，7，1： | 1 |
| 7 | Stochastic oscillations of general relativistic discs显示文摘 | HARKO T MOCANU G | 2012 | MNRAS2012，421，4： | 1 |
| 8 | Unified classical and quantum radiation mechanism for ultrarelativistic electrons in curved and inhomogeneous magnetic fields显示文摘 | Harko T Cheng K S | 2002 | Monthly Notices of the Royal Astronomical Society2002，335，1： | 1 |
| 9 | Introduction to normative multiagent systems显示文摘 | Guido Boella Leendert Torre Harko Verhagen | 2006 | Computational and Mathematical Organization Theory (-)2006，，2： | 1 |
| 10 | Quantum cosmology with a nonlinear Born-Infeld type scalar field 显示文摘 | LU H Q HARKO T CHENG K S | 1999 | Int J Mordern Phys D1999，8，： | 1 |
| 11 | Fractal dimension and thermodynamic fluctuation properties of IDV light curves显示文摘Fractals are a basic tool for phenomenologically describing natural objects having a high degree of temporal or spatial variability.From a physical point of view the fractal properties of natural systems can also be interpreted by using the standard formalism of thermodynamical fluctuations.We introduce and analyze the fractal dimension of the Intra-Day-Variability (IDV) light-curves of BL Lac objects,in the optical,radio and X-ray bands.A general description of the fluctuation spectrum of these systems based on general thermodynamical principles is also proposed.Based on the general fractal properties of a given physical system,we also introduce the predictability index for the IDV light curves.We have explicitly determined the fractal dimension for the R-band observations of five blazars,as well as for the radio band observations of the compact extragalactic radio source J 1128+5925 and of several X-ray sources.Our results show that the fractal dimension of the optical and X-ray observations indicates an almost pure 'Brownian noise' (random walk) spectrum,with a very low predictability index,while in the radio band the predictability index is much higher.We have also studied the spectral properties of the IDV light curves and we have shown that their spectral index is very closely correlated with the corresponding fractal dimension. | Chun-Sing Leung Jian-Yan Wei Zoltan Kovlics Tiberiu Harko | 2011 | Research in Astronomy and Astrophysics2011，11，9： | 0 |
| 12 | On the Integrability of the Abel and of the Extended Liénard Equations显示文摘We present some exact integrability cases of the extended Liénard equation y′′+ f(y)(y′)n +k(y)(y′)m + g(y)y′+ h(y) = 0, with n > 0 and m > 0 arbitrary constants, while f(y), k(y), g(y), and h(y) are arbitrary functions. The solutions are obtained by transforming the equation Liénard equation to an equivalent first kind first order Abel type equation given bydv/dy= f(y)v3-n+ k(y)v3-m+ g(y)v2+ h(y)v3, with v = 1/y′.As a first step in our study we obtain three integrability cases of the extended quadratic-cubic Liénard equation,corresponding to n = 2 and m = 3, by assuming that particular solutions of the associated Abel equation are known. Under this assumption the general solutions of the Abel and Liénard equations with coefficients satisfying some differential conditions can be obtained in an exact closed form. With the use of the Chiellini integrability condition, we show that if a particular solution of the Abel equation is known, the general solution of the extended quadratic cubic Liénard equation can be obtained by quadratures. The Chiellini integrability condition is extended to generalized Abel equations with g(y) ≡ 0 and h(y) ≡ 0, and arbitrary n and m, thus allowing to obtain the general solution of the corresponding Liénard equation. The application of the generalized Chiellini condition to the case of the reduced Riccati equation is also considered. | Man Kwong Mak Tiberiu HARKO | 2019 | Acta Mathematicae Applicatae Sinica2019，35，4： | 0 |
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